Bohn LO070 Service Manual

Replaces 412.0, May 2004

LOAIRE® UNIT COOLERS

Technical Guide

Models LO | Air Defrost • LOD | Electric Defrost • LOG | Hot Gas Defrost

BNLFTB

May 2008

www.thecoldstandard.com

Table of Contents

Nomenclature .........................................................................................................................................................................................................2

Features & Benets ...............................................................................................................................................................................................

Performance Data

All Defrost Types ............................................................................................................................................................................................ 4

Specications

Air Defrost ........................................................................................................................................................................................................5

Electric Defrost ...............................................................................................................................................................................................5

Hot Gas Defrost .............................................................................................................................................................................................. 5

Dimensional Data ..................................................................................................................................................................................................6

Replacement Parts by InterLink™ ....................................................................................................................................................................6

Physical Data ...........................................................................................................................................................................................................7

Standard Nozzle Selection .................................................................................................................................................................................

We have made a commitment to customer needs, innovation and environmental stewardship and have dedicated
ourselves to delivering energy-ecient choices. PSC and EC motors will reduce costs, improve the bottom line and
enhance equipment performance and service life.

3

7

Choose the most energy-ecient motor available for evaporators.

The EC motor is an Energy Solutions® option on new Bohn Lo-Aire®
evaporators. Available on all new equipment or as an easy-to-install,
drop-in replacement aftermarket part from InterLink™ Commercial
Refrigeration Parts. Because they’re a drop-in replacement for existing
shaded pole and PSC motors, installation is quick and easy. It’s a high
impact, quick payback solution for reducing costs and achieving green
initiatives without replacing the entire system.

EC motors by InterLink are up to 75% ecient - that’s a 51-59% increase

over shaded pole motors and a 30-35% increase over permanent-split
capacitor (PSC) motors. With all of this added eciency, you can count

on more energy savings and lower operational costs while taking a
step in the right direction toward conserving our planet’s resources.

To learn more about EC motors, visit www.interlinkparts.com/ec.

Nomenclature

LO 070 A E

Model Series Capacity Electrical Code Design Revision

LO = Bohn Lo-Aire, air defrost
LOD = Bohn Lo-Aire, electric defrost
LOG = Bohn Lo-Aire, hot gas defrost

2

# x 100 = BTUH A = 115/1/60

B = 208-230/1/60
AH = 115/1/60 (PSC)
BH = 208-230/1/60 (PSC)
MH = 460/1/60 (PSC)
AE = 115/1/60 (EC)
BE = 208-230/1/60 (EC)

©2008 Heatcraft Refrigeration Products LLC

Features & Benefits

Lo-Aire® unit coolers are ideal for meat storage and preparation rooms, oral coolers, dough retarding and many other
applications requiring low air velocities and low sound levels. With low velocity unit coolers, high humidities can be maintained
to prevent product drying and weight loss. These units are ideal for any type of workroom where human comfort is important.

Cabinet

Rust-free, all-aluminum white case with louvered intake grille for attractive appearance

•

Statically and dynamically balanced fans are designed for quiet air movement

•

All factory installed electrical components are wired to a terminal board in the junction box making eld wiring quick

•
and easy

Inlet connection allows for external mounting of TXV

•

Coil

Sweat-type cooling coil connections reduce the potential for leaks

•

Nickel-steel alloy heaters provide a positive defrost and have long life

•

Electric defrost coils have a hermetically sealed defrost termination thermostat that does not require adjustment. Hot gas

•
defrost units come with an adjustable defrost termination thermostat

Cross-n cooling coils with corrugated aluminum ns spaced 6 FPI & 3/8" OD staggered copper tubes provide optimum

•
heat transfer and reduce the amount of refrigerant required

Generous coil surface helps to maintain steady room temperature and minimize product shrinkage

•

Access port on the suction connection allows superheat to be easily and accurately set

•

Drain Pan

Hot gas models use inner drain pans with low-wattage electric heaters. This eliminates the braze joints and tubing

•
associated with hot gas drain pan loops

All models use inner drain pans to reduce sweating

•

Motors

Motors are factory-wired to unit junction box for fast installation

•

Thermal overload protected motors are resiliently mounted inside the unit to assure minimum noise level

•

High eciency PSC motors are optional on sizes 070 through 165. PSC motors are standard on sizes 189 through 266

•

EC Motors (optional) available factory-installed or as a drop-in replacement through InterLink™ Commercial Refrigeration

•
Parts in 115/1/60 and 208-230/1/60

Options

Units available with copper fins. Air defrost units also available with polyester coated fins or various coil coatings options•

3

Performance Data

Model LO/LOD/LOG Air/Electric/Hot Gas Defrost | 60 Hz

Capacity Fan Data

Model

10°F TD

25°F SST

BTUH

LO*070 7,000 2,050 10,500 3,075 14,000 4,100 2 1,200 2,040

LO*087 8,700 2,550 13,050 3,822 17,400 5,100 2 1,200 2,040

LO*118 11,800 3,460 17,700 5,183 23,600 6,910 2 1,300 2,210

LO*125 12,500 3,660 18,750 5,490 25,000 7,320 2 1,300 2,210

LO*150 15,000 4,390 22,500 6,590 30,000 8,790 2 1,900 3,230

LO*165 16,500 4,830 24,750 7,250 33,000 9,670 2 1,900 3,230

LO*189 18,900 5,540 28,350 8,300 37,800 11,070 2 2,400 4,080

LO*225 22,500 6,590 33,750 9,890 45,000 13,180 2 2,700 4,590

LO*266 26,600 7,790 39,900 11,690 53,200 15,580 2 3,200 5,440

6°C TD

-4°C SST

Watts BTUH Watts BTUH Watts

15°F TD

25°F SST

8°C TD

-4°C SST

20°F TD

25°F SST

10°C TD

-4°C SST

No.

CFM m3h

Model LO/LOD/LOG Air/Electric/Hot Gas Defrost | 50 Hz

Capacity Fan Data

Model

10°F TD

25°F SST

BTUH

LO*070 6,390 1,870 9,588 2,810 12,780 3,740 2 1,085 1,846

LO*087 7,950 2,330 11,917 3,490 15,900 4,660 2 1,085 1,846

LO*118 10,780 3,160 16,162 4,730 21,560 6,320 2 1,176 1,999

LO*125 11,420 3,350 17,123 5,020 22,840 6,690 2 1,176 1,999

LO*150 13,700 4,010 20,546 6,020 27,400 8,030 2 1,719 2,922

LO*165 15,070 4,410 22,601 6,620 30,140 8,830 2 1,719 2,922

LO*189 17,260 5,060 25,888 7,580 34,520 10,110 2 2,171 3,691

LO*225 20,550 6,020 30,819 9,030 41,100 12,040 2 2,443 4,153

LO*266 24,290 7,120 36,433 10,670 48,580 14,230 2 2,895 4,922

6°C TD

-4°C SST

Watts BTUH Watts BTUH Watts

15°F TD

25°F SST

8°C TD

-4°C SST

20°F TD

25°F SST

10°C TD

-4°C SST

No.

CFM m3h

4

Performance Data

Model LO Air Defrost

Shaded Pole Motor PSC Motor EC Motor

Model

LO070 3.6 232 2.4 244 1.24 164 0.82 182 – – 1.8 57 1.0 59

LO087 3.6 232 2.4 244 1.24 164 0.82 182 – – 1.8 57 1.0 59

LO118 3.6 232 2.4 244 1.24 164 0.82 182 – – 1.8 57 1.0 59

LO125 3.6 232 2.4 244 1.24 164 0.82 182 – – 1.8 57 1.0 59

LO150 3.6 232 2.4 244 1.24 164 0.82 182 – – 1.8 57 1.0 59

LO165 3.6 232 2.4 244 1.24 164 0.82 182 – – 1.8 57 1.0 59

LO189 – – – – 2.80 230 1.40 230 0.8 288 4.8 210 2.4 215

LO225 – – – – 2.80 230 1.40 230 0.8 288 4.8 210 2.4 215

LO266 – – – – 2.80 230 1.40 230 0.8 288 4.8 210 2.4 215

Model LOD Electric Defrost

Model

LOD070 2.4 244 0.82 182 – – 1.0 59 2,650 11.5 –

LOD087 2.4 244 0.82 182 – – 1.0 59 2,650 11.5 –

LOD118 2.4 244 0.82 182 – – 1.0 59 3,850 16.7 –

LOD125 2.4 244 0.82 182 – – 1.0 59 3,850 16.7 –

LOD150 2.4 244 0.82 182 – – 1.0 59 3,850 16.7 –

LOD165 2.4 244 0.82 182 – – 1.0 59 3,850 16.7 –

LOD189 – – 1.40 230 0.8 288 4.8 215 4,770 20.7 10.4

LOD225 – – 1.40 230 0.8 288 4.8 215 5,700 24.8 12.4

LOD266 – – 1.40 230 0.8 288 4.8 215 5,700 24.8 12.4

115/1 208-230/1 115/1 208-230/1 460/1 115/1 208-230/1

Amps Watts Amps Watts Amps Watts Amps Watts Amps Watts Amps Watts Amps Watts

Shaded Pole Motor PSC Motor EC Motor

208-230/1 208-230/1 460/1 208-230/1

Amps Watts Amps Watts Amps Watts Amps Watts Total Amps

Defrost Heaters

208-230/1 460/1

Watts

Model LOG Hot Gas Defrost

Shaded Pole Motor PSC Motor EC Motor

Model

LOG070 3.6 232 2.4 244 1.24 164 1.0 182 – – 1.8 57 1.0 59 660 5.8 2.9 –

LOG087 3.6 232 2.4 244 1.24 164 1.0 182 – – 1.8 57 1.0 59 660 5.8 2.9 –

LOG118 3.6 232 2.4 244 1.24 164 1.0 182 – – 1.8 57 1.0 59 960 8.4 4.2 –

LOG125 3.6 232 2.4 244 1.24 164 1.0 182 – – 1.8 57 1.0 59 960 8.4 4.2 –

LOG150 3.6 232 2.4 244 1.24 164 1.0 182 – – 1.8 57 1.0 59 960 8.4 4.2 –

LOG165 3.6 232 2.4 244 1.24 164 1.0 182 – – 1.8 57 1.0 59 960 8.4 4.2 –

LOG189 – – – – 2.80 230 1.4 230 .08 288 4.8 210 2.4 215 1,190 10.4 5.2 2.6

LOG225 – – – – 2.80 230 1.4 230 .08 288 4.8 210 2.4 215 1,426 12.4 6.2 3.1

LOG266 – – – – 2.80 230 1.4 230 .08 288 4.8 210 2.4 215 1,426 12.4 6.2 3.1

115/1 208-230/1 115/1 208-230/1 460/1 115/1 208-230/1

Amps Watts Amps Watts Amps Watts Amps Watts Amps Watts Amps Watts Amps Watts Total Amps

Drain Pan Heaters

115/1

Watts

208-

230/1

460/1

5

Commercial Refrigeration Parts

Dimensional Data

LO = Air Defrost
LOD = Electric Defrost
LOG = Hot Gas Defrost

Dimensional Data For All Models

Dimensions

Model

LO*070 83 2108 49 1245 17 432 14 356 22 559 19-1/2 495 23-1/4 591
LO*087 83 2108 49 1245 17 432 14 356 22 559 19-1/2 495 23-1/4 591
LO*118 111 2819 38-1/2 978 17 432 14-1/2 368 22 559 19-1/2 495 23-1/4 591
LO*125 111 2819 38-1/2 978 17 432 14-1/2 368 22 559 19-1/2 495 23-1/4 591
LO*150 114 2896 38-1/2 978 18-1/2 470 16 406 22 559 19-1/2 495 23-1/4 591
LO*165 114 2896 38-1/2 978 18-1/2 470 16 406 22 559 19-1/2 495 23-1/4 591
LO*189 134 3404 48-1/2 1232 18-1/2 470 16-1/2 419 22 559 19-1/2 495 23-1/4 591
LO*225 153 3886 58 1473 18-1/2 470 16-1/2 419 22 559 19-1/2 495 23-1/4 591
LO*266 158 4013 58 1473 21 533 20 508 27 689 24-1/2 622 28-1/4 718

A B C D E F G

in. mm in. mm in. mm in. mm in. mm in. mm in. mm

Replacement Parts

Part # Description

4267W

22512501 Terminal Strip

Right source. Right parts. Right now.

InterLink™ is your link to a complete line of dependable and
certied commercial refrigeration parts, accessories and innovative
electronic controls for all Bohn equipment. At InterLink, we
provide our wholesalers with a comprehensive selection of
product solutions and innovative technologies for the installed
customer base. And every product is built to ensure the same
high performance standards with which all Heatcraft Refrigeration
Products (HRP) brands are built — backed by a dedicated team to
serve every customer need, delivering at the best lead times in the
industry.

Dependable. Versatile. Courteous.

Finally, one simple source for all your replacement needs from a
name you can trust.

For parts, please contact [phone] or visit www.interlinkparts.com.

Motors

Model

LO*070 25300101 25300201 25300601 25300501 – 25317801 25317701
LO*087 25300101 25300201 25300601 25300501 – 25317801 25317701
LO*118 25300101 25300201 25300601 25300501 – 25317801 25317701
LO*125 25300101 25300201 25300601 25300501 – 25317801 25317701
LO*150 25300101 25300201 25300601 25300501 – 25317801 25317701
LO*165 25300101 25300201 25300601 25300501 – 25317801 25317701
LO*189 – – 2530688 2530689 25305001 25318201 25318101
LO*225 – – 2530688 2530689 25305001 25318201 25318101
LO*266 – – 2530688 2530689 25305001 25318201 25318101

115V SP

(2) Req’d

230V SP

(2) Req’d

115V PSC

(2) Req’d

28906601 Defrost Termination / Fan Delay Thermostat

2697490 Drain Fitting: Adapter
2697491 Drain Fitting: Locknut
2771001 Drain Fitting: Washer

26925101 Drain Fitting

Model

LO*070 22900601 2316597 4040170 2470063 89900801
LO*087 22900601 2316597 4040170 2470063 89900801
LO*118 22900601 2316597 4040171 2470130 89900801
LO*125 22900601 2316597 4040171 2470130 89900801
LO*150 22900701 2316598 4040171 2470130 89900802
LO*165 22900701 2316598 4040171 2470130 89900802
LO*189 2291240 4000111 4040172 2470160 89900802
LO*225 2291240 4000111 4040174 2470200 89900802
LO*266 2291624 4000112 4040173 2470200 89900803

Part #

230V PSC

(2) Req’d

LOG Defrost Termination / Fan Delay Thermostat

Fan Blade

(2) Req’d

460V PSC

(2) Req’d

Motor

Mount

(2) Req’d

Drain Pan

115V EC

(2) Req’d

Defrost

Heater

(2) Req’d

230V EC

(2) Req’d

Filters

6

Physical Data

Model LO/LOD/LOG

Connections OD (in.) Approx. Net Weight

Model

LO*070 1/2 7/8 1/2 178 81
LO*087 1/2 7/8 1/2 189 86
LO*118 1/2 7/8 1/2 262 119
LO*125 1/2 7/8 1/2 264 120
LO*150 1/2 1-1/8 1/2 280 127
LO*165 1/2 1-1/8 1/2 285 129
LO*189 1/2 1-1/8 1/2 298 135
LO*225 1/2 1-1/8 1/2 366 166
LO*266 1/2 1-3/8 5/8 405 184

†

7/8" inlet on hot gas defrost models

Inlet

†

Suction Hot Gas lbs. kg

Standard Nozzle Selection

Model LO Air Defrost

Distributor Type

Model

OD Length

in. cm in. cm

LO070 3/16 0.5 24 61 2 L-1/2 L-1/3
LO087 3/16 0.5 24 61 2 L-3/4 L-1/2
LO118 3/16 0.5 24 61 4 L-1 L-1/2
LO125 3/16 0.5 24 61 4 L-1 L-3/4
LO150 3/16 0.5 24 61 4 L-1 L-3/4
LO165 3/16 0.5 24 61 6 L-1-1/2 L-3/4
LO189 3/16 0.5 24 61 4 L-1-1/2 L-1
LO225 3/16 0.5 24 61 6 L-2 L-1
LO266 3/16 0.5 30 76 12 L-2 L-1-1/2

No. of

Circuits

R-404A
Nozzle*

LO = Air Defrost
LOD = Electric Defrost
LOG = Hot Gas Defrost

R-22

Nozzle

Model LOD Electric Defrost

Distributor Type

Model

OD Length

in. cm in. cm

LOD070 3/16 0.5 24 61 2 L-3/4 L-1/2
LOD087 3/16 0.5 24 61 2 L-1 L-3/4
LOD118 3/16 0.5 24 61 4 L-1-1/2 L-3/4
LOD125 3/16 0.5 24 61 4 L-1-1/2 L-3/4
LOD150 3/16 0.5 24 61 4 L-2 L-1
LOD165 3/16 0.5 24 61 6 L-2 L-1
LOD189 3/16 0.5 24 61 4 L-2-1/2 L-1-1/2
LOD225 3/16 0.5 24 61 6 L-3 L-1-1/2
LOD266 3/16 0.5 30 76 12 L-3 L-2

No. of

Circuits

R-404A
Nozzle*

R-22

Nozzle

Model LOG Hot Gas Defrost

Distributor Type

Model

OD Length

in. cm in. cm

LOG070 1/4 0.6 24 61 2 L-3/4 L-1/2
LOG087 1/4 0.6 24 61 2 L-1 L-3/4
LOG118 1/4 0.6 24 61 4 L-1-1/2 L-3/4
LOG125 1/4 0.6 24 61 4 L-1-1/2 L-3/4
LOG150 1/4 0.6 24 61 4 L-2 L-1
LOG165 1/4 0.6 24 61 6 L-2 L-1
LOG189 1/4 0.6 24 61 4 L-2-1/2 L-1-1/2
LOG225 1/4 0.6 24 61 6 L-3 L-1-1/2
LOG266 1/4 0.6 30 76 12 E-3 E-2

* also suitable for R-507, R-502, R-134A, R-401A, R-402A

NOTE: Nozzles sized for 90-100˚F liquid temp. at expansion valve. Refer to I&O manual if liquid temp. is not 90-100˚F.

Note: Refrigeration system will not perform properly without correct nozzle!

No. of

Circuits

R-404A
Nozzle*

R-22

Nozzle

7

For more information on Bohn refrigeration products, contact
your sales representative or visit us at www.thecoldstandard.com.

A Brand of Heatcraft Refrigeration Products LLC

2175 West Park Place Blvd. • Stone Mountain, GA • 30087

800.537.7775 • FAX [phone]

www.thecoldstandard.com

Since product improvement is a continuing eort, we reserve the right to
make changes in specications without notice.

BN-LFTB-0508 | Version 000